JPH05130504A - Image display controller - Google Patents

Abstract

PURPOSE:To execute every kind of work while monitoring plural images being superimposed on a display by setting the superposition ratio of the plural images according to a picture element distribution pattern, and synthesizing the images by applying thinning processing to them. CONSTITUTION:A synthesis processing part 24 and a superposition ratio selection part 25 are provided at a display control part 23. Image data memory 21, 22 store the images to be synthesized. The synthesis processing part 24 selects one of two kinds of image signals inputted synchronously in picture element unit according to a control signal outputted from the selection part 25, and outputs it to frame memory 19. The selection part 25 prepares many kinds of picture element distribution patterns 1C which decide the selection of the picture element of the image at every picture element. An operator selects one of the picture element distribution patterns, and the selection part 5 outputs a prescribed control signal to the synthesis processing part 24 according to the above selection. The processing part 24 performs synthesis by applying the thinning processing to the images according to the picture element distribution pattern set in advance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display control device used for composite display of a plurality of images on a display of an information processing device.

[0002]

2. Description of the Related Art In information processing apparatuses such as computers, it has been widely practiced to display a plurality of images on a display in an overlapping manner due to the development of a multi-window display system. FIG. 2 shows a block diagram of a conventional general image display system. The system shown in the figure is controlled by the processor 1. The processor 1 is connected to the main storage device 3, the magnetic disk device 4, and the I / O via the bus line 2.
An O interface 5, a keyboard control unit 6, a display control unit 7, and a communication interface 8 are connected. A keyboard 9 and a mouse 10 are connected to the keyboard control unit 6. Further, a display 11 is connected to the display controller 7. A communication line 12 is connected to the communication interface 8.

The main memory 3 is composed of a random access memory for storing programs and data for the processor 1 to operate. Magnetic disk unit 4
Is a device for storing character image data and image image data to be displayed on the display 11 as a file. The I / O interface 5 is a circuit that controls signal input / output with various external devices. The keyboard control unit 6 is a circuit for notifying the processor 1 of a signal input using the mouse 10 or the keyboard 9 via the bus line 2. The display controller 7 is a control circuit for displaying a predetermined image on the display 11. The communication interface 8 is a circuit that controls communication between the communication line 12 and this image display system. With the circuit as described above, for example, various image data input from the communication line 12 are temporarily stored in the magnetic disk device 4, and then these image data are read into the main storage device 3 and the display control unit 7 is used. Is displayed on the display 11. For example, for the character image, the data input using the keyboard 10 or the like is used. Also, the image image is
For example, it is read by an image reader (not shown) connected to the I / O interface 5.

FIG. 3 shows a block diagram of a conventional general image display control device. This apparatus is a block diagram specifically showing the image display control portion of the image display system. A keyboard 6, a mouse 10 and an image reader 13 are connected to the processor 1 in the figure. On the output side of the processor 1, a character data memory 17 for storing character data input by the keyboard 6, and an image for storing image data input using the mouse 10 or the image reader 13. Data memory 18
Are connected. Further, the outputs of the character data memory 17 and the image data memory 18 are input to the display control unit 7. The display control unit 7 is a circuit that synthesizes character data and image data to generate image data for one screen and outputs the image data to the frame memory 19. The image data read from the frame memory 19 is displayed on the display 11.

FIG. 4 is an explanatory view of a conventional general image display example. FIG. 1A shows a state in which the character image 15 is displayed on the display 11. Further, FIG. 3B shows a state in which the image image 16 is displayed on the display 11.
When the data for displaying the character image 15 and the image image 16 as shown in FIGS. 4A and 4B are simultaneously input, the display control unit 7 shown in FIG. And outputs to the frame memory 19. Therefore, the image as shown in FIG. 4C is displayed on the display 11 of FIG.

[0006]

By the way, in the conventional general image display control apparatus as described above, when a plurality of images are combined and displayed as shown in FIG. 4, the combining method is set in advance. Was limited to a few different methods. That is,
In the example of FIG. 4, when the character image 15 and the image image 16 are combined, the method of displaying the character image 15 over the image image 16 as shown in FIG. 4C and vice versa. Either one of the two methods of displaying the image image 16 overlaid on the image 15 is adopted. Therefore, when the character image 15 overlaps the image image 16, all the character images can be read, but in the opposite case, the character image is hidden by the image image and an unreadable portion occurs. In this case, the operator is required to perform an appropriate operation such as inverting the vertical relationship between the character image 15 and the image image 16 or temporarily deleting the image image as necessary.

However, in the case of creating a document using a multi-window system or the like, the document creation work is not possible if the operation for adjusting the overlap is performed every time a part of the character overlaps another image. Be efficient. Also,
When a document is created while referring to another image, deleting the other image hinders the document creation work. Not only when the character image and the image image are overlapped with each other, but when two image images are overlapped with each other, it may not always be the best method to display only one of the overlapped portions. That is, there are cases where it is desired to refer to the lower image even when the images vertically overlap each other. Conventional image display control devices have not always been satisfactory in response to the above-mentioned various requirements. The present invention has been made by paying attention to the above points, and when a plurality of images overlap with each other, the respective images are automatically combined and displayed in a state desired by the operator to perform document creation work or this type of operation. It is an object of the present invention to provide an image display control device in which the image processing work is made multifunctional.

[0008]

According to a first aspect of the present invention, when a plurality of images displayed on a display overlap each other, an image signal of an overlapping portion of each image is set to a preset pixel distribution pattern. In accordance with the above, a synthesizing processing unit that decimates and synthesizes both pixels, and the pixel distribution pattern
The present invention relates to an image display control device, comprising: an overlapping ratio selecting unit that prepares a plurality of overlapping images so that the overlapping ratios of the images change, and switches the setting. A second aspect of the present invention is a display control unit that displays a plurality of images on a display and a mode of creating one of the images, and when the one image overlaps with the other image, the other image is displayed. And an evacuation control unit that changes the display state so as to evacuate the image from the overlapping portion. According to a third aspect of the present invention, when a plurality of images displayed on the display are overlapped with each other, one of the images is in a creation mode,
In the overlapping portion where the one image overlaps with the other image, a display control unit that compositely displays the one image and the other image, and the one image on the other image in the overlapping portion, the other The image display control device is provided with a modification control unit that displays a modification that can be distinguished from the image.

[0009]

When the first image 1A and the second image 1B are combined, this apparatus thins out both images in accordance with a preset pixel distribution pattern 1C. Regarding the composite image 1D, the pixels of one of the images are thinned out and the pixels of the other image are displayed in the overlapping portion.
If this pixel distribution pattern is changed, the overlapping ratio of the two changes. Further, during the creation of either one of the images, the overlapping of the images is detected, one of the images is saved, or one of them is modified. As a result, it is possible to perform processing that makes use of both images at the overlapping portion of the plurality of images.

[0010]

The present invention will be described in detail below with reference to the embodiments shown in the drawings. FIG. 1 is a block diagram showing an apparatus embodiment of the present invention. The illustrated apparatus is included in a part of the image display system as described above with reference to FIG. Here, the device of the present invention is
A first image data memory 21 for storing the data of the first image 1A and a second image data memory 22 for storing the data of the second image 1B are provided, and these are configured to be combined in the display control unit 23. .. The output of the display control unit 23 is sent to the frame memory 19 and the composite image 1D is sent to the frame memory 19.
Is stored and displayed on the display 11.

The display control unit 23 includes a synthesizing processing unit 24.
And an overlap ratio selection unit 25 is provided. The first image data memory 21 and the second image data memory 2
2 is composed of a random access memory or the like that stores images to be combined. In addition, the synthesis processing unit 24
Is configured by a circuit that selects one of two types of image signals that are input in synchronization on a pixel-by-pixel basis according to a control signal output from the overlap ratio selection unit 25 and outputs the selected image signal to the frame memory 19. This circuit may be configured by a gate circuit, or the processor itself may display the display control unit 23.
The entire operation of the above may be executed by a predetermined program. The overlapping ratio selection unit 25 prepares various pixel distribution patterns 1C that determine which image pixel is selected for each pixel when two types of images are overlapped in advance. The operator selects one of these, and according to the selection, the overlap ratio selection unit 25 outputs a predetermined control signal to the synthesis processing unit 24. In order to specifically describe the operation of the device of the present invention, the input / output control of the frame memory 19 will be described below.

FIG. 5 shows a frame memory input / output signal explanatory diagram. As shown, the frame memory 19 is composed of, for example, a 2-port dynamic RAM. The composite image data is input to the frame memory 19 from the display control unit 23 described above through the random access port 35. The display data is output to the display 11 shown in FIG. 1 through the serial buffer 36 and the serial access port 37 provided inside the frame memory 19.

The image data 38 stored in the frame memory 19 as described above is accessed by a raster address in the vertical direction and a pixel address in the horizontal direction, as shown in the upper right of the figure. Further, such an address signal AD is
It is generated by the row address counters 31 and 32 and the column address counter 33, and is input through the multiplexer 34. The row address counter 31 is a counter that generates a display raster address for serial buffer access. In addition, the row address counter 3
Reference numeral 2 is a counter that generates a raster address when inputting image data. The column address counter 33 is a counter that generates a pixel address when image data is input.
The address signals generated by these counters are
The signals are selected by the multiplexer 34 at a predetermined timing, switched, and input to the frame memory 19. In order to set the row address and the column address of the frame memory 19, the row address strobe R
AS and column address strobe CAS are input. Further, a write enable signal WE is input for controlling data writing.

FIG. 6 shows a frame memory input control time chart as described above. Figure (a) shows address signal A
D, (b) shows the row address strobe RAS, (c) shows the column address strobe CAS, (d) shows the input image data, and (e) shows the write enable signal WE. As shown in the figure, the access cycle for one pixel is performed in units of time T. Then, in order to specify one raster in the image, the row address signal RA0 is input, and this is set by the row address strobe RAS.
After that, column address signals CA0 to CAn are input to specify each pixel forming the line. The column address strobe CAS sets these when inputting each column address. Image data of one raster is input while the row address strobe RAS is valid. Note that the strobe signal, the write enable signal, and the like are both low active signals. As described above, the image data is input pixel by pixel at the timing when the address signal for each column is set, and the write enable signal WE is set to the time T to allow the writing.
It becomes effective in the cycle.

FIG. 7 shows a frame memory output control time chart. FIG. 3A shows the address signal AD,
(B) shows the image data to be read. As shown in the figure, a row address signal RA0 and a column address signal CA designating each pixel included in the raster.
When 0 to CAn are sequentially output and an address signal for one raster is supplied to the frame memory, data for one raster is transferred to the serial buffer 36 shown in FIG. This is output to the display according to the display clock signal. Such an operation is executed during the image data input period for one screen, and the image for one screen is displayed on the display. The display control unit 23 shown in FIG. 1 outputs the combined image data to the frame memory 19 at the above timing.

FIG. 8 shows an example of a pixel distribution pattern according to the present invention. In this embodiment, the overlapping ratio selection unit 25 shown in FIG. 1 prepares nine kinds of pixel distribution patterns from (a) to (i) as shown in the figure, and one of them is selected according to the operator's selection. It shall operate so as to set a pixel distribution pattern. Note that blank white dots 4 in the pattern
1 indicates that the pixels of the first image are thinned out for the pixels in that portion, and the pixels of the second image are displayed.
Further, the black dots 42 filled in with black indicate that the pixels of the first image in that portion are left and the pixels of the second image are thinned out. The pattern of FIG. 8A represents that the ratio of the first image to the second image is 0:16. That is, in the overlapping portion, the second image overlaps the first image, and the first image is entirely hidden. The pattern in FIG. 8B is a pattern in which the overlapping ratio of the first image and the second image is 2:14. 4x4 in this pattern
The first image in the matrix of 2 pixels is 2
, 14 pixels are displayed in the second image. Similarly, FIG. 8 (c) is 4:12, (d) is 6:10, (e) is 8: 8, (f) is 10: 6, (g) is 12: 4, and (h).
Indicates an overlapping ratio of 14: 2 and (i) is 16: 0. In the case of (i), the first image is displayed over the second image, and the second image is not displayed in the overlapping portion.

FIG. 9 is an explanatory view of composite image data by the apparatus of the present invention. A procedure for specifically synthesizing the first image data and the second image data using the above-described pixel distribution pattern will be described with reference to this drawing. First, both the first image data and the second image data are data whose contents show black dots. Moreover, the same figure (c)
The pixel distribution pattern shown in FIG. 8 is, for example, the pattern of (e) shown in FIG. When the first image data as shown in (a) above and the second image data as shown in (b) are combined by the pixel distribution pattern shown in (c),
Composite image data as shown in (d) is obtained. That is,
The first image data is displayed in the black dot portion of the pixel distribution pattern, and the second image data is displayed in the white dot portion. The vertical direction in the figure is accessed by a row address, and the horizontal direction is accessed by a column address. The address signal and processing timing for this image composition are as follows.

FIG. 10 shows an explanatory diagram of an operation example of the apparatus of the present invention shown in FIG. 1A shows the address signal AD output to the frame memory 19 of FIG. 1, FIG. 2B shows the input timing of the first image data, and FIG. 2C shows the input timing of the second image data input to the display control unit 23. Show. Also,
(D) shows the pixel distribution pattern, and (e) shows the output timing of the composite image data output from the display control unit 23. As shown in the drawing, when the row address RA0 and the column addresses CA0 to CA3 designating each pixel in the raster are sequentially output, the first image data or the second image data is output at the output portion of each column address. Is selected according to the pixel distribution pattern shown in (d),
It is output as composite image data as shown in (e).
The black portion of the pixel distribution pattern in the figure is the first
The part where the image data is selected and used as the combined image data, and the white part is the part where the second image data is selected and used as the combined image data. By executing such processing for 4 × 4 pixels, the composite image data shown in FIG. 9D is obtained. The overlap ratio selection unit 25 shown in FIG. 1 receives an instruction to select any one of the various pixel distribution patterns as shown in FIG. 9, for example, and instructs the synthesis processing unit 24 to select one of two types according to the setting. A selection signal for selecting an image signal will be output.

FIG. 11 is a diagram illustrating a specific example of the first invention.
Actual image data is composed of an extremely large number of pixels. For example, the first image data (a) shown in FIG. 11 displays a figure similar to the letter N of the alphabet,
The second image data shown in (b) is composed of an image in which most of the right side is painted black. An image like this
One square in the figure is composed of, for example, 4 × 4 dot pixels. In the image synthesizing shown above, the image distribution pattern is set for each of such squares. FIGS. 11C and 11D show image composition patterns having different overlapping ratios. When two types of image data as shown in FIGS. 11A and 11B are superposed, the visibility in the case where they are overlapped differs depending on the color and the density of the dots displaying both. .. Therefore, the operator can select the overlapping ratio while supposing how much the overlapping ratio is selected so that both images can be recognized with desired densities.

FIG. 12 exemplifies a composite image based on the pixel distribution pattern of Example 1 shown in FIG. Black dot 43 in the figure
Is a black dot of the first image and the second image.
Is the black dot of the second image. In this example, the first image appears much more clearly than the second image. Example 2 in FIG.
7 shows a composite image based on the pixel allocation pattern of FIG. The black dots 43 and the black dots 44 in this figure are the same as those shown in FIG. 12, respectively, and show the black dots of the first image and the second image and the black dots of the second image. First in this example
The second image appears more clearly than the image. For example, when the dots forming the first image are dots of a color that is extremely easy to recognize, both can be recognized sufficiently even with such an overlapping ratio.

FIG. 14 shows a block diagram of an apparatus according to the second aspect of the present invention. In the illustrated apparatus, a keyboard 6, a mouse 10 and an image reader 13 are connected to a processor 1 similar to that described above with reference to FIG. Further, the output side of the processor 1 is connected to a character data memory 17 and an image data memory 18 for storing data created by a keyboard 6, a mouse 10, an image reader 13 and the like. The character data memory 17
And the output of the image data memory 18 are output to the display controller 26, respectively. This display control unit 26
Is configured so that either character data or image data is selected, combined, and output to the frame memory 19. The composite image data stored in the frame memory 19 is displayed on the display 11. Here, in the device of the second aspect of the present invention, the display control unit 26 is configured to detect the overlap between the character data and the image data and notify the processor 1 of this. The processor 1 is provided with a save control unit 27 that saves one of the overlapping images.

FIG. 15 is an explanatory view of the overlap detecting method of the second invention. The display control unit 26 shown in FIG. 14 detects the overlap between the two images by the method shown in this figure. First, Fig. 1
In FIG. 5 (a), the window A is displayed on the display 11.
And window B is displayed. In addition, the character image 15 is displayed. Here, it is assumed that the operator uses the character image 15 to create an appropriate document. In this case, when a character overlaps the window A during the creation of this document, if the window A is overlaid on the character, the character is hidden and the document cannot be recognized. On the contrary, even if the characters are displayed overlapping each other on the window A, when the window A displays a complicated figure, the characters are very difficult to see. Therefore, in this case, the display control unit 26 shown in FIG. 14 detects the overlap between the character and the window. This overlap detection is performed by detecting whether or not the cursor 52 for character input overlaps the reference line 51 provided on the left side of the window A or the window B as shown in FIG. 5A, for example.

That is, when the window A or the window B is displayed, the reference line 5 is provided in advance on the left side of the window with a width of a character.
1 is set in advance. The display coordinates of the reference line and the display coordinates of the cursor 52 are always compared. Then, when the display coordinates of the cursor 52 come to the right of the display coordinates of the reference line 51, the detection signals are output assuming that the images overlap each other. In the example shown in FIG. 15B, the reference frame 53 is provided outside the windows A and B. This is an example in which the overlap of images can be detected for both horizontally written characters and vertically written characters. Further, as shown in (c), the reference frame 53 may be provided inside each window. Also in this case, when the cursor tries to enter the reference frame, this is detected and the processor 1 is notified that the images overlap each other.

FIG. 16 shows an image display example explanatory diagram of the second invention for explaining the operation of the evacuation control unit 27 shown in FIG. In the figure, (a) shows an example in which a part of the character image 15 overlaps with the window A without any processing according to the present invention. Further, FIG. 16B shows an example in which the window A is deleted when the character image overlaps the window A. Further, (c) shows an example of moving the display position of the window A when the character image overlaps the window A. Further, (d) shows an example in which when the character image 15 overlaps the window A, the window A is reduced and displayed. As shown in the above example, in the character image creation mode, when the character image overlaps with a window that is another image, the apparatus changes the display state so as to save the window. The display changing process itself is achieved by a well-known display technique.

FIG. 17 shows an operation flowchart of the apparatus of the second invention. The device of the second invention operates according to such a flowchart. First, when character data is input (step S1), the display control unit 26 detects the cursor position as described above (step S2).
Then, it is determined whether or not an overlap has occurred according to the procedure described above (step S3). If the overlap does not occur, the data input is continued, but if the overlap occurs, it is judged whether or not the automatic control is performed (step S4). That is,
In the case of automatic control, the optimum one is automatically selected from the respective saving operations shown in FIGS. 16 (b), 16 (c) and 16 (d). On the other hand, when it is not the automatic control, the process is performed by any of the saving methods (b), (c), and (d) set by the operator. For example, if the setting is (b) in step S5, the process proceeds to step S6, and the corresponding window is erased. If the setting is (c) in step S7, the process moves to step S8 and the window is moved. Further, when the setting is (d) in step S9, step S10
Then, the relevant window is reduced.

On the other hand, in the case of automatic control, the process proceeds from step S4 to step S11, and first, it is determined whether or not the setting (c) is possible. Then, if the setting (c) operation is possible, the process moves to step S8 and the corresponding window is moved. Next, when it is determined in step S11 that setting (c) is impossible, the process proceeds to step S12, and it is determined whether setting (d) is possible. If this is possible then step S
Moving to 10, the corresponding window is reduced. When it is determined that the setting (d) is impossible in step S12, the process proceeds to step S6 and the corresponding window is erased. Through the above processing, the document being created can be clearly displayed without being disturbed by other window displays.

FIG. 18 shows a block diagram of an apparatus of the third invention. The apparent configuration of the device shown in the figure is the same as that of the device of the second invention already described in FIG. Here, when the display control unit 28 of the third aspect of the present invention detects an overlap, the processor 1 controls the modification of the image in the overlap portion. To this end, the processor 1 is provided with a modification control unit 29.

FIG. 19 shows an explanatory diagram of an image composition example of the third invention. The modification control unit 29 controls the image composition by the method shown in the figure. FIG. 19A shows a character image, and FIG. 19B shows an image image, which are superimposed on each other and combined. Here, the modification control unit 29 performs color-coded modification as shown in (c), for example. That is, the character image 15 is overlapped on the image image 16, and the character image 15 is colored in the overlapping portion. Although this explanatory drawing cannot be colored, the letters D, E, and F in the drawing are assumed to be colored with a specific color that can be clearly distinguished from the image image 16, for example. Further, (d) shows an example of whiteout modification. That is, in this example, the characters D, E, and F overlapping the image image 16 are white characters. Further, (e) shows a method of modifying the frame. That is, in this example, the characters D, E, and F that overlap the image image 16
Is surrounded by a white frame and is designed to be easily read. Such modification technique itself can be performed by a conventionally well-known method.

FIG. 20 shows an operation flowchart of the device of the third invention. In the figure, first, in step S1, it is determined whether or not an image input process. In the case of a character input other than the image input process, that is, the process proceeds to step S2, and the character data input process is executed. Further, in the case of the image input process, the process proceeds to step S3, and the image data is read by the image reader 13 shown in FIG. 18, for example. Then, in step S4, the image display area is designated. Next, when character data input processing is being performed, it is determined in step S5 whether or not there is an overlapping portion between the image data and the character data display. If there is no overlapping portion here, step S
If there is an overlapping portion in step 8, the overlapping position is detected (step S6). Then, the character data is modified in the same manner as described above (step S7). Then, after such processing is executed, the process proceeds to step S8, and the display of the composite screen is controlled. And
This screen is displayed on the display in step S9. In addition, in the above-mentioned embodiment, when the character image overlaps with the image image during the generation of the character image, the character image is modified to clearly display the character image. However, on the contrary, when the image image overlaps the character image during the generation of the image image, control may be performed such that the image image is clearly displayed.

[0030]

In the image display control apparatus of the present invention described above, when a plurality of images are overlapped with each other, the overlapping ratio of the images is set according to a preset pixel distribution pattern, and both pixels are thinned out and combined. As a result, any one image does not overlap with the other image and the other image is not hidden at all. Therefore, various kinds of work can be performed while monitoring both the plurality of overlapping images on the display. The second invention of the present invention is
In the mode for creating one image, when that image overlaps the other image, the overlap is detected and the display state is changed so that the other image is saved. It is possible to proceed with the image creation work smoothly without worrying about. Further, in the third aspect of the present invention, when a plurality of images overlap each other in one image creation mode, the image being created is modified and overlapped with another image so that the image being created can be viewed. Combing can facilitate the image creation work.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an apparatus of the present invention.

FIG. 2 is a block diagram of a general image display system.

FIG. 3 is a block diagram of a conventional general image display control device.

FIG. 4 is a diagram illustrating a conventional general image display example.

FIG. 5 is an explanatory diagram of a frame memory input / output signal.

FIG. 6 is a frame memory input control time chart.

FIG. 7 is a frame memory output control time chart.

FIG. 8 is an explanatory diagram of an example of a pixel distribution pattern according to the present invention.

FIG. 9 is an explanatory diagram of composite image data by the device of the present invention.

FIG. 10 is an explanatory diagram of an operation example of the device of the present invention.

FIG. 11 is an explanatory view of a specific example of the first invention.

FIG. 12 is an explanatory diagram of a composite image based on the pixel distribution pattern of Example 1.

FIG. 13 is an explanatory diagram of a composite image based on a pixel allocation pattern of Example 2.

FIG. 14 is a block diagram showing an apparatus embodiment of the second invention.

FIG. 15 is an explanatory diagram of an overlap detection method of the second invention.

FIG. 16 is an explanatory diagram of an image display example of the second invention.

FIG. 17 is an operation flowchart of the device of the second invention.

FIG. 18 is a block diagram showing an apparatus embodiment of the third invention.

FIG. 19 is an explanatory diagram of an image synthesis example of the third invention.

FIG. 20 is an operation flowchart of the device of the third invention.

[Explanation of symbols]

 11 Display 19 Frame Memory 21 First Image Data Memory 22 Second Image Data Memory 23 Display Control Section 24 Compositing Processing Section 25 Overlap Ratio Selecting Section 1A 1st Image 1B 2nd Image 1C Pixel Allocation Pattern 1D Composite Image

Claims (3)

[Claims] 1. When a plurality of images displayed on a display overlap each other, the image signals of the overlapping portions of the respective images are thinned out and combined in accordance with a preset pixel distribution pattern. An image characterized by comprising a combination processing unit and a plurality of pixel distribution patterns prepared so that an overlapping ratio of a plurality of images in the overlapping portion changes, and switching the setting, and an overlapping ratio selecting unit. Display controller. 2. A display control unit for displaying a plurality of images on a display, and when one of the images overlaps with the other image in a mode of creating one of the images, the other image is overlapped with the other image. An image display control device, comprising: an evacuation control unit that changes a display state so as to evacuate a portion. 3. When a plurality of images displayed on a display are overlapped with each other, in one of the image creation modes, the one image is overlapped with the other image at the overlapping portion. And a display control unit for compositely displaying the other image, and a modification control unit for displaying the one image on the other image in the overlapping portion with a modification distinguishable from the other image. An image display control device characterized by the above.